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Annotation of src/etc/netstart, Revision 1.33

1.1       deraadt     1: #!/bin/sh -
                      2: #
1.33    ! deraadt     3: #      $OpenBSD: netstart,v 1.32 1997/11/29 02:03:43 kstailey Exp $
1.1       deraadt     4:
                      5: # /etc/myname contains my symbolic name
                      6: #
                      7: hostname=`cat /etc/myname`
                      8: hostname $hostname
                      9: if [ -f /etc/defaultdomain ]; then
                     10:        domainname `cat /etc/defaultdomain`
1.4       dm         11: fi
1.30      deraadt    12:
                     13: # pick up option configuration
                     14: . /etc/rc.conf
1.4       dm         15:
                     16: # Configure the IP filter before configuring network interfaces
                     17: #
                     18: if [ X"${ipfilter}" = X"YES" -a -f "${ipfilter_rules}" ]; then
                     19:        echo 'configuring IP filter'
                     20:        ipf -Fa -f ${ipfilter_rules} -E
                     21: else
                     22:        ipfilter=NO
1.1       deraadt    23: fi
1.17      kstailey   24:
                     25: # Configure NAT before configuring network interfaces
                     26: #
1.32      kstailey   27: if [ "${nat}" = "YES" -a "${ipfilter}" = "YES" -a -f "${nat_rules}" ]; then
1.17      kstailey   28:        echo 'configuring NAT'
                     29:        ipnat -CF -f ${nat_rules}
                     30: else
                     31:        nat=NO
1.33    ! deraadt    32: fi
        !            33:
        !            34: if [ X"${iproute}" = X"YES" ]; then
        !            35:        sysctl -w net.inet.ip.forwarding=1
1.17      kstailey   36: fi
                     37:
1.24      kstailey   38: # set the address for the loopback interface
                     39: ifconfig lo0 inet localhost
1.1       deraadt    40:
1.24      kstailey   41: # use loopback, not the wire
1.28      millert    42: route add -host $hostname localhost
1.24      kstailey   43: route add -net 127 127.0.0.1 -reject
                     44:
                     45: # configure all of the non-loopback interfaces which we know about.
1.1       deraadt    46: # do this by reading /etc/hostname.* files, where * is the name
                     47: # of a given interface.
                     48: #
                     49: # these files are formatted like the following, but with no # at the
                     50: # beginning of the line
                     51: #
                     52: # addr_family hostname netmask broadcast_addr options
                     53: # dest dest_addr
                     54: #
                     55: # addr_family is the address family of the interface, generally inet
                     56: # hostname is the host name that belongs to the interface, in /etc/hosts.
                     57: # netmask is the network mask for the interface.
                     58: # broadcast_addr is the broadcast address for the interface
                     59: # options are misc. options to ifconfig for the interface.
                     60: #
                     61: # dest is simply the string "dest" (no quotes, though) if the interface
                     62: # has a "destination" (i.e. it's a point-to-point link, like SLIP).
                     63: # dest_addr is the hostname of the other end of the link, in /etc/hosts
                     64: #
                     65: # the only required contents of the file are the addr_family field
                     66: # and the hostname.
                     67:
                     68: (
                     69:     tmp="$IFS"
                     70:     IFS="$IFS."
                     71:     set -- `echo /etc/hostname*`
                     72:     IFS=$tmp
                     73:     unset tmp
                     74:
                     75:     while [ $# -ge 2 ] ; do
                     76:         shift            # get rid of "hostname"
                     77:         (
                     78:             read af name mask bcaddr extras
1.31      deraadt    79:             read dt dtaddr
1.1       deraadt    80:
                     81:             if [ ! -n "$name" ]; then
                     82:                 echo "/etc/hostname.$1: invalid network configuration file"
                     83:                 exit
                     84:             fi
                     85:
                     86:            cmd="ifconfig $1 $af $name "
                     87:            if [ "${dt}" = "dest" ]; then cmd="$cmd $dtaddr"; fi
                     88:            if [ -n "$mask" ]; then cmd="$cmd netmask $mask"; fi
                     89:            if [ -n "$bcaddr" -a "X$bcaddr" != "XNONE" ]; then
                     90:                cmd="$cmd broadcast $bcaddr";
                     91:            fi
                     92:            cmd="$cmd $extras"
                     93:
                     94:            $cmd
                     95:         ) < /etc/hostname.$1
                     96:         shift
                     97:     done
                     98: )
                     99:
1.14      deraadt   100: # /etc/mygate, if it exists, contains the name of my gateway host
                    101: # that name must be in /etc/hosts.
                    102: if [ -f /etc/mygate ]; then
1.28      millert   103:        route add -host default `cat /etc/mygate`
1.14      deraadt   104: fi
1.6       tholo     105:
                    106: # default multicast route
1.9       deraadt   107: route add -net 224.0.0.0 -interface $hostname
1.1       deraadt   108: